| CIID | C I Instructional Design 
| Others |
| CIID | California Institute for Innovation and Development
| Others |
| CIID | Canadian International Institute Dhaka
| Others |
| CIID | Center for Immunology and Inflammatory Diseases
| Others |
| CIID | Center for Infectious and Inflammatory Diseases
| Others |
| CIID | Center for the Integration of IDEA Data
| Others |
| CIID | Central Insurance Industry Database
| Others |
| CIID | Certified Ignition Interlock Device
| Others |
| CIID | Chest Injury International Database
| Others |
| CIID | China Institute of Interior Design
| Others |
| CIID | Computer Implemented Inventions Directive
| Others |
| CIID | Copenhagen Institute of Interaction Design
| Others |
| CIID | Criminal Intelligence and Investigations Directorate
| Others |